Synthesis, NMR and structural studies of cluster derivatives derived from reactions of 1,2,3-triphenyl-1,2,3-triphosphaindan with [Os3(CO)10(μ-H)2]

Reactions of 1,2,3-triphenyl-1,2,3-triphosphaindan (I) with [Os3(CO)10(μ-H)2] at various conditions afford a series of osmium carbonyl cluster derivatives: an open bent-chain trinuclear cluster [Os3(CO)9{μ3-η3-PPhC6H4(PPh)2}] (1), a di-substituted bridged trinuclear cluster [Os3(CO)10{μ-1,3-η2-C6H4(PPh)3}] (2), a 1,3-linked bis-trinuclear hydride cluster [{(μ-H)2Os3(CO)9}2{μ-1,3-η2-{C6H4(PPh)3}] (3), an open bent-chain trinuclear cluster [Os3(CO)7{C6H4(PPh)3}{μ3-η3-{(PPh)2C6H4PPh}] (4), and a closed trinuclear cluster [(μ-H)Os3(CO)8{C6H4(PPh)3}{μ-η3-{C6H4(PPh)2PC6H4}] (5). All the compounds obtained have been fully characterized by spectroscopic methods (IR, FABMS, 1H- and 31P-NMR spectroscopy), and the molecular structures of 3, 4, 5 are established by X-ray crystallography.